25-08-2020, 11:45 PM
If you want a key or "inside information", you're probably looking pre-Baresch though. His correspondence suggests that the MS was in his possession without a key or information about the cipher/script. By the time it gets to Kircher, the connection to its origin and makers is lost.
Still, I would find it very valuable to read what these later owners may have written about it
Still, I would find it very valuable to read what these later owners may have written about it